Answer:
a=28 degrees
b=62 degrees
Step-by-step explanation:
Use substitution.
Since we know a right angle = 90 deg, then a+b=90 (1st equation)
Our second equation is a+3=1/2b
subtract -3 to make a=1/2b-3, then plug in the a value into the a+b=90 equation. Then solve for b.
subtract the value that you got for b from 90deg to give you the value for a.
